(Aus., usu. prison) a sexual pervert.
|Poor Man’s Orange 38: ‘Just look at that dirty ole secko, will you?’ he said disgustedly, and scooping up a stone he ran after it, yelling, ‘Merv, Merv, the rotten old perv.’.|
|‘Whisper All Aussie Dict.’ Kings Cross Whisper (Sydney) xxxix 4/5: sexos or seckos: Prisoners sentenced for sex crimes against young persons. The most despised of all prisoners.|
|Theatre Two (1981) 44: bo-bo Hell, I fancy that dark-haired goosey. [...] D’you check the way she sort of looked at me? I think I’m in there. howellsie Kap it uit, ou sekkie!Ducktails in Gray|
|Aus. Prison Sl. Gloss. [Internet] Secco. A sexual offender. Term generalises to someone who is obsessed with sex.|
|Lingo 77: Some less than complimentary examples include secko for a sex maniac or pervert, also sicko for someone whose interests are off-centre.|